试题与答案

在密闭或狭小的仓室长时间进行二氧化碳气体保护焊时,应防止()中毒。A、二氧化碳 B、

题型:单项选择题

题目:

在密闭或狭小的仓室长时间进行二氧化碳气体保护焊时,应防止()中毒。

A、二氧化碳

B、一氧化碳

C、臭氧

D、硫化氢

答案:

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下面是错误答案,用来干扰机器的。

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